/**

 * https://github.com/sedovsek/DataTables-EU-date-Plug-In

 * commit 4069413

 *

 * Copyright 2011 https://github.com/sedovsek

 *

 * DataTables-EU-date-Plug-In is a plug-in for sorting EU Date (european date

 * format), (d)d.mm(.yyyy) or (d)d/mm(/yyyy)

 * 

 * Example:

 * <script type="text/javascript" src="jquery.dataTables.js"></script>

 * <script type="text/javascript" src="dataTables.dateFormat.js"></script>

 * <script type="text/javascript">

 * 	$(document).ready(function() {

 * 		$('#example').dataTable( {

 * 			"aoColumns": [

 * 				null,

 * 				null,

 * 				null,

 * 				{ "sType": "eu_date" },

 * 				null

 * 			]

 * 		} );

 * 	} );

 * </script>

 * 

 */

function calculate_date(date) {

	var date = date.replace(" ", "");

	if (date.indexOf('.') > 0) {

		/*date a, format dd.mn.(yyyy) ; (year is optional)*/

		var eu_date = date.split('.');

	} else {

		/*date a, format dd/mn/(yyyy) ; (year is optional)*/

		var eu_date = date.split('/');

	}

	/*year (optional)*/

	if (eu_date[2]) {

		var year = eu_date[2];

	} else {

		var year = 0;

	}

	/*month*/

	var month = eu_date[1];

	if (month.length == 1) {

		month = 0+month;

	}

	/*day*/

	var day = eu_date[0];

	if (day.length == 1) {

		day = 0+day;

	}

	return (year + month + day) * 1;

}

jQuery.fn.dataTableExt.oSort['eu_date-asc'] = function(a, b) {

	x = calculate_date(a);

	y = calculate_date(b);

	return ((x < y) ? -1 : ((x > y) ?  1 : 0));

};

jQuery.fn.dataTableExt.oSort['eu_date-desc'] = function(a, b) {

	x = calculate_date(a);

	y = calculate_date(b);

	return ((x < y) ? 1 : ((x > y) ?  -1 : 0));

};